MetaMask is a new program which allows users to execute Ethereum Applications
Primary Features and Uses
MetaMask is an extension primarily designed to allow users to access Ethereum applications without being required to activate Ethereum directly. In other words, it acts as a "bridge" between a standard operating system and this unique blockchain computing platform. As this is an open-source project, it is currently free to download and developers are urged to contribute to its further development. Please note that at the time that this article was written, MetaMask is only able to be used with the Google Chrome browser. The company claims that variants for Firefox should be available in the future.
Additional Details and Technical Information
MetaMask currently supports Ethereum-based applications such as Gnosis, Maker and TokenFactory. Once this extension is downloaded, it will function directly from the Chrome browser and allow users to access data from the Ethereum blockchain. Secure firewalls are included, so the chances of personal data theft have been virtually eliminated. It is possible for a single user to create numerous accounts and a "seed phrase" can access all of these accounts.